Heating mechanism for kilns.



T. CAREY & L. SGHA'BLOSKB. HEATING MECHANISM FOR KILNS.

APPLICATION IILED FEB-19, 1913.

Patented Oct. 27, 191 1 '2 snnms-snnm 1.

THE NORRIS PETERS 60.. PHOTO-LITHO.. WASHINGTON. By C T. CAREY & L. SGHABLOSKE.

HEATING MECHANISM FOB. KILNS.

j APPLICATION PILED'IEBJQ, 1913.

1,1 15,171, Patented 0ct.27,1914.-

2 SHEETS-SHEET 2.

[H5 NORRIS PETERS 60 PHO10LITHO., WASHINGTON. D4 C.

THOMAS CAREY AND LEN SCI-IABLOSKE, OF CHICAGO, ILLINOIS.

HEATING MECHANISM FOR KILNS.

Specification of Letters Patent.

Patented Oct. 27, 1914.

Application filed February 19, 1913. ,Serial No. 749,500. I

To (ZZZ whom it mag/concern Be 1t known that we, THOMAS CAREY and IlnN SCHABLOSKE, citizens of the Unlted States, residing at Chicago, county of Cook,

anism and arrangement for kilns, particularly for kilns in which ceramic products such as bricks, building blocks, tile, etc.,-

are fired.

Wood and coal have been used as fuel but with more or less inefficiency as considerable time was necessary and the heat distribution was not always uniform and there was considerable waste. became expensive, oil came into use as the fuel, but now oil is also becoming more costly and the market price is so fluctuating, the price sometimes going up so high that its use as fule in the ordinary manner would be prohibitive from a business standpoint.

The general object of our invention is to provide heating mechanism which can utilize coal or wood as a fuel much more efiiciently than has heretofore been possible. This we accomplish by providing improved grate mechanism; by forcing the draft with steam, preferably superheated, and air; by blowing air and steam under considerable pressure below grate level to distribute the heat from the fire to the bricks or. other products at and near the bottom of the kiln; and by blowing air and steam, preferably superheated, into the kiln above grate level so that heat is throughout the interior of the kiln. Improved superheating mechanism and steam and air flow controlling mechanisms are provided. The various mechanisms are grouped into heating units which can be readily moved and carried from one kiln to another. 1

In the drawings which illustrate the various features of the invention, Figure l is a perspective view of the corner of a kiln showing a heating unit in operative position; Fig. 2 is a side elevational view of the kiln with the right end thereof in section on a vertical. median plane; Fig. 3 is an enlarged view, partly in section, of an inspirator, and Fig. 4 is a perspective view of a nozzle.

As wood and coal uniformly distributed The products to be fired, such as brick, are built up as usual to form a pile 5 in which one or more archways 6 are provided in the usual manner. In the ends of the archways the grates 7 are set up. The grate which we use has hollow grate bars communicating at their front ends with hollow head 8 and secured at their rear ends to head 9. To support the grate at its front end we utilize an arch frame 10 having ledges 11 and 12 on its opposite inner sides for supporting a -cross beam 13 on which the front end of the grate rests. At the rear end of the grate a cross beam 14 receives the grate bars and at its ends rests on the brickwork at the sides of the archway 6. The arch frame 10 may be within the archway, or in front thereof, or partly within and partly outside. Pivot lugs 15 on one side of the arch frame serve to support a door 16, and the other side has a detent extension 17 for locking the door,

the door having draft openings 18. The

arch frame by overhanging the front part of the grate is highly heatedby the-fire on the grate and is hollow and included in a steam circuit so that the steam may be highly superheated.

A main pipe 19 supplies steam for the various heating outfits. A branch pipe 20 leads from the main pipe to the front head of the grate and includes controlling valves 21 and 22 at the main pipe and head respec tively, the hollow grate bars having upwardly opening outlets 23. Inserted in pipe 20 between valve 22 and the outer grate head is an inspirator 24c having air inlets 25 (.see Fig. 3), the steam flowing from nozzle 26 taking up air through these inlets so that air and steam are forced from the grate outlets 23 into and through the burning mass of wood or coal on the grate, thus producing a very hot fire. A branch pipe 27 leads from'pipe 20 to the blast nozzle 28 pointing intothe archway 6 below the grate. A. valve 29 controls the flow through pipe 27 and between the valve and the blast nozzle is inserted an air inspirator 30.

Steam and air may thus be blown into the archway below the grate to carry heat to the center of the kiln and particularly to the lower courses thereof. Another pipe 31 leads from the main pipe 19 to a multiple outlet nozzle 32 disposed in the archway above the grate so that steam may be blown toward the center of the kiln to create circulation of heat from the grate uniformly throughout-the kiln and to prevent the heat from accumulating directly above the grate and becomingtoo intense. The flow through pipe 31 is controlled by valves33 and 33, and an air inspirator 3% may be inserted between valve 33 and the nozzle 32.

Av pipe.35.connects pipe 31 with the inlet-- they pipe 27 atapointbetweenvalve 29 and inspirator 30, a valve 40 controlling pipe 38. By. ad]usting.the various valveseither normal steam or superheated steanymay be caused to flow. through the various pipes.

If it isdesired touse only normal steam,

valves 37 and 40 are closed. If superheated steainflow. tothe grate andto nozzleQSis desired, valves 37 and 10 are opened and Valve 21 closed; 7 Theflow, willthen be from 19, through pipes 31. and 35, arch frame. 10, pipe 3:8, andpipe 27, dart. of the superheated steam then flowing through inspirator 30 and nozzle 28, andthe remainder flowing through pipe 20 and inspirator 2 1 to .the grate, Ifsuperheated steam flow to nozzle 32 is desired, valves 37 and 40 are opened and valve, 33 closed, steam then flow.-

ing from main pipe 19, through pipe 20,

arch frame 10,. ps 35,. andpipe 31 to nozzle 32, the stea nbfeing highly superheated in thefhotarch frame. By, adjusting the corresponding valves, steam.flow may be cut off from thenozzles,or the grate, or the arch 35 frame,

and most efficient results. By forcing the fire with steam, or steam and air, and then preventing localization of;the heat and cause ing rapid and uniformdistribution thereof throughout the kiln, firing can be accomplished in much shorter time and with greater eflicien cyv andless expense. than in the. old systems using wood or coal for fuel.

It will be noted that the grate outlets 4.5 23 increase in size in proportion to their distance from the inlet end of head 8 in order that friction may becompensated for and the outflow of steam and air may be uniform. The arch frame 10 hasa drain outlet 41 for water of condensation.

We do not desire t be limited to the precise construction, arrangement and operationdescribed, aschanges and modifications are no doubt possible which would still come within the scope ofthe invention, and

We claim the followin frame and having thereon, means for supplying steam to said hollow arch frame to be superheated by the ;heat; from said. fire, and a connection for leading the superheated steam to said grate.

as desired, in order to get, the best mam 1. In heating mechanism for kilns, the combinatlon of a hollow arch frame applied at the entrance of'the usual'arehway in the kiln,a hollow grate supported on said arch blast outlets in the fire 2. In heating mechanism for kilns, the combination of a hollow arch frame applied at. the entrance of the usual archway in the kiln a hollow grate. supported on said arch frame and having blast outlets in the fire,

thereon, means for supplying steam to said hollow. arch frame to be superheated by the heat from said fire, a nozzle pointing. into, saidarchway below the grate and controllable connections between said arch frame and said grate and nozzle for conveying the superheated steam.

3. In heating mechanism forkilns, the combination of a hollow arch frame. applied atthe entrance of the usual archwayin the kiln, ahollow. grate supported on said arch frame and having blast outlets in the fire thereon, means for supplying steamtO said hollow arch frame to .be superheated by the heat from said fire, a connection for leading the superheated steam to said grate, and an airinspirator included in said connection to admit air tothesteam. V a I ln heating mechanism for kilns, the combination of a hollow arch frame applied at the entrance of the usual archway. in the kiln, ahollow grate supported on said arch frameand having blast outlets in the fire thereon, means for. supplying steam to said hollow arch frame to be snperheatedby. the heat from said. fire, a nozzle pointing into said archway below the grate. and controllable connections between said arch frame and said grate and nozzle for conveying the superheated steam, and air inspirators included in said connectionsto admit air to. the superheated steam.

In testimony whereof we have signed our names to this specification inthe presence of two subscribing witnesses this 29th day of January, A, B51913, at Chicago, Illinois.

THOMAS CAREY. LEN SOHABLOSK E.

' Witnesses:

KARL Prmrrnn, J, P. ORoonnn.

Copies otjchis patent may be obtained. for five-eentseaeh;addressing the Commissioner of Patents,

Washington, 1). 0. 

